Home / 2,478.11-3,717.15-629.21

Finding the Fourth Proportional to 2,478.11, 3,717.15 and 629.21

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Solution

The fourth proportional to 2,478.11, 3,717.15 and 629.21 is: 943.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.11 : 3,717.15 = 629.21 : x
  2. Step 2: Convert to fraction form
    2,478.11/3,717.15 = 629.21/x
  3. Step 3: Cross multiply
    2,478.11x = 3,717.15 × 629.21
  4. Step 4: Simplify right side
    2,478.11x = 2,338,867.95
  5. Step 5: Solve for x
    x = 2,338,867.95/2,478.11
  6. Step 6: Final answer
    x = 943.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.